Ten miles has been fixed as the usual limit for a change of freight rates in South Carolina, but the railroads may, if they so desire for intermediate distances, adopt rates also intermediate between those given in the tables.
When the distance between stations ends in a fraction of a mile, such fraction, if .5 or over will be counted as a mile. If less than .5 such fraction will not be considered.
Stations not over two miles beyond the upper limits of ten-mile group may be included in such group. The Commission reserves the right, however, to correct the charge in extreme cases which work hardships, although the same may not violate the letter of its rules.
S.C. Code Regs. § 103-25